Improvement in machinery for doubling and twisting silk



i rUiyiTnn TaTns PATENT Tries.

J. CONANT AND L. DIMOCK, OF NORTHAMPTON, MASSACHUSETTS.

IMPROVEMENT IN MACHINERY FOR DOUBLING AND TWISl'ING SILK, dc.

Specification.forming part of Letters Patent No. 7,@33, dated December17, iSiO.

To @ZZ whom t may concern:

Be it known that we, J osnrrr CoNANr and LUCIUs DIMOGK, of Northampton,in the county of Hampshire and State of Massachusetts, have invented anew and useful Improvement in the Machine for Doubling, Twisting, andReeling Silk, being a catch-bar for catching and holding all the threadssimultaneously and liberating them successively as required, which isdescribed as follows, reference being had to the annexed drawings ofthesame, making part of this specification.

Figure 1 is a side elevation of a section of the bar. Fig. 2 is aVertical longitudinal section of the same, the catches being closed uponthe threads or silk. Fig. 3 is a vertical longitudinal section of thesame, the catches being held open by the sliding lock-plate. Fig. 4 is atop view.

y Similar letters in the several figures refer to corresponding parts.

The form ot' the catch-bars heretofore used for holding the threads inmachines for doubling, twisting, and reeling thread and silk, being wellknown,will not require to'be particularly described. In securing theends of the threads by these bars the ends of each pair or set ofthreads had to be sewed separately, the bar being upon the machine andthe threads brought down upon them and under the catches, which werethen brought against the threads.

By the use of our improved catch-bar all the threads are grasped andsecured at one operation by bringing the bar down upon them anddisengaging a slide lock-plate from the end of the bar, which liberatesall the catches simultaneously and allows the springs to close them uponthe threads, leaving them in such a position that they can be opened toliberate the threads one by one, at the pleasurev of the operator. Inorder to accomplish this object, we arrange the catches a in a bar ofwood, b,with separate springs c, to bear against the long arms of thecatch-levers for the purpose of pressing the short arms of thecatchlevers into the grooves ot" the catch-boxes d, wherein the threadsare held securely until the catches are again opened. In order to openall the catches simultaneously, a metallic sliding plate, e, is used inconnection with the bar, containing as many oblong niortisesf as thereare catches, the long arms. of which being extended upward through theniortises in the bar and through the sliding lock-plate. Having openedall the catches by drawing back the slide and forced its hooked end downand against the end of the bar, and thus locked the plate, the bar isnext brought down upon the threads, the threads entering the notches inthe bar and the angular spaces between the catches and boxes, and thebar being held in a horizontal transverse position by two vertical pinsrising from the spindle-frame and entering apertures in the bar. Thilethe bar is in this position raise the hook end of the slide lock-plateand disengage it. As soon as this is done the helical springs will closethe catches upon the threads and hold them securely, at the same timethrowing the lock-slide forward. The threads are then all cut and thebars shifted, the one last named, which was next to the spindle, beingplaced on the reel, and the bar which was adjacent to the spools beingplaced on pins rising from the back of the spindleframe. The threads arethen reeled into skeins. lt now becomes necessary to liberate the endsof the threads separately, for the purpose of tying their ends. This isdone by bearing the long arm ofthe catch toward the helical spring,which is operated by hand, the slots in the sliding plate beingsufiiciently long to allow them to be moved back the required distance.A s soon as each thread is liberated the catch will be forced back toits former position by the helical spring.

The sliding lock-plate is attached to the top of the bar by screwspassed through oblong mortises in the same, said mortises being of suchlength and width as to allow the slide to have the required movementlongitudinally.

A section of the bar and two catches only are represented in thedrawings; but it will be understood that the bar may be from ten tofifteen feet in length and contain from fifty to one hundred catches,according to the size et' the machine to which it-is to be applied.

Having thus described the nature of our invention and manner ofoperating the saine, what we claim as new, and desire to secure byLetters Patent, is-

So constructing the catch-bar that all the threads or silk, eitherbefore or after being twisted, maybe secured by the catchessimultaneously by simply bringing the bar with its catches down upon thethreads, and while in that position causing,` all the helical springs toIn testimony whereof We have hereunto aot on the catches at the sainetime by suddenly signed our naines before two subscribing Witdisengagingthe slide look-plate from the end I nesses. f

of the bar, the mortis/es in the said plate being T Tf so fori-ned as toallow each eateh to be opened separately Without the aid of the lool-plate, o1 I J all to be opened simultaneously by moving,` l "ilfnesses:

said lock-plate longitudinally7 in the manner .Tnssn D. HoL'ioN7 hereinfully set forth. A SAMUEL WELLS.

